[CHE101]

Hey everyone,

Say that I wanted to measure the Ni2+ in water by using a nickel wire connected to a silver/silver chloride reference electrode...

A potential of .8 V is observed.  How would I be able to ball park the Nickel 2+ concentration by using the nernst equation.  Thanks.

 

[Borek]

Writing the Nernst equation for the Ni/Ni²⁺ electrode would be the first step.

[CHE101]

Writing the Nernst equation for the Ni/Ni²⁺ electrode would be the first step.

not used to calculating conc. from the Nernst.  But, anyway here's what I came up with...

Ni2+(aq) / Ni(s) // Cl-(aq) / AgCl(s) / Ag(s)

I know the E for Ag/AgCl elec. sat. w/ KCL is .197 volts and is used as E (left).   

E (cell) = E (right) - E(left)

I am fairly confused on what to do now.  Would E (right) be the .8 volts observed?  And which form of the Nernst equation do I use? I feel like I am working with not enough information.  Any help is very much appreciated.